The following designs are not considered canon within the context provided by other designs on the Yotsuya's Shipyard website, and are being shared here because... well, why not?

Niece and Nephew Designs

The following two ships were designed by the niece and nephew of Yotsuya.

In the case of his nephew, Yotsuya tried to warn him, "If you stick the photon torpedoes there, they'll blow up their own bridge when they fire them!" But his nephew insisted that was how he wanted his ship to look, so that was what he got!

His niece's design is actually quite elegant, and may have been considered for inclusion in the fleet... except it wouldn't be fair to include one and not the other.

(Also note that the registry numbers displayed on these ships were chosen somewhat arbitrarily, and obviously conflict with ships in the Saladin and Hermes Classes. If these ships had been intended as official Yotsuya's Shipyard designs, care would have been taken to avoid such a conflict.)

Untitled "Fat Secondary Hull" Design

This is a ship that was designed by Yotsuya, and is a design he likes. So why is it excluded from the "Yotsuya's Shipyard" canon? Simple: he could not think of a justifiable reason for the design. It really isn't much more then a slightly larger (when compared to the Constitution Class) Heavy Cruiser. And in official canon, Starfleet already has a new and larger Cruiser style ship in the Excelsior Class.

Maybe someday, Yotsuya will have an epiphany and a proper context for this design will be revealed, allowing this design to be incorporated into the Yotsuya's Shipyard canon. But for now, it was at least desired to share this design with you here.